Year % of GDP 2000 1.59847891 2001 2.51523924 2002 2.39986205 2003 2.12393045 2004 1.79756808 2005 1.53422332 2006 1.39375639 2007 1.47248399 2008 1.50249875 2009 2.2079618 2010 2.25556993 2011 1.97078466 2012 1.9472518 2013 2.08904266 2014 2.466609 2015 3.57679915 2016 4.03627825 2017 3.98828077 2018 4.57789421 2019 4.72437525 2020 5.67045593 2021 5.18634224